湿度
材料科学
化学电阻器
重复性
佩多:嘘
气体分析呼吸
再现性
聚苯乙烯磺酸盐
聚苯乙烯
相对湿度
水分
复合材料
聚合物
纳米技术
色谱法
化学
物理
热力学
作者
Edilene Assunção da Silva,Caroline Duc,Nathalie Redon,Jean‐Luc Wojkiewicz
标识
DOI:10.1002/mame.202100489
摘要
Abstract The discrimination of humidity in exhaled breath is of utmost importance to turn breath analysis into an efficient noninvasive tool for early diagnosis or treatment monitoring of several diseases. Herein, by assembling different ratios of the conductive poly(3,4‐ethylenedioxythiophene): polystyrene sulfonate with the polymer matrix polyethylene oxide (PEO), humidity chemiresistor‐based sensors are designed and investigated. The testing results display a broad relative humidity detection range (6–92%), repeatability, reproducibility, and good reversibility. Meanwhile, the sensors possess good reliability for distinct temperatures and in the presence of typical volatile organic compounds found in human exhaled air. The hygroscopic idiosyncrasy of PEO is attributed to be the main responsible for the high sensibility toward humidity. In a proof‐of‐principle for detection of respiration humidity, the outcome shows the ability of the chemiresistors to detect the humidity variation in a real case of breath exposure up to 2 s intervals. The 30 d trial of stability readings shows a standard deviation of only 2.6%. These sensing devices appear as a new array component able to distinguish moisture from biomarkers of diagnosed diseases in breath analysis.
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